MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 cb6107c4531b230c31244db28ca307058384a7ae968e0f0e41991f35a77b2e72. While MalwareBazaar tries to identify whether the sample provided is malicious or not, there is no guarantee that a sample in MalwareBazaar is malicious.

Database Entry


Formbook


Vendor detections: 16


Intelligence 16 IOCs YARA 26 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: cb6107c4531b230c31244db28ca307058384a7ae968e0f0e41991f35a77b2e72
SHA3-384 hash: 13aa30976f1424246ac60fbc1560b439eb34f0e3bddab3451cca8cd9252d30295bf162cb000e79b6098d4b38bf0e42f0
SHA1 hash: 00a602284372a484294dd60c1f635f9f83cbb814
MD5 hash: 4b839744f3da36cf3b8c629df940038e
humanhash: autumn-sink-blossom-king
File name:YAxzE128nxjJBmq.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:1'075'712 bytes
First seen:2026-02-10 15:02:19 UTC
Last seen:2026-02-10 15:23:42 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'821 x AgentTesla, 19'743 x Formbook, 12'286 x SnakeKeylogger)
ssdeep 24576:tj/guQO5Wo5jMbJs7vbPaa2THij4viL3ZvTtT6PjZidtVict:aul1MbJsrs2j4virFTIPqtQc
TLSH T18F3512303799CF65C8B527FA6930E27927B56C6F6512C30ACEE65CEF74AAB015420723
TrID 71.1% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
10.2% (.EXE) Win64 Executable (generic) (10522/11/4)
6.3% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.3% (.EXE) Win32 Executable (generic) (4504/4/1)
2.0% (.ICL) Windows Icons Library (generic) (2059/9)
Magika pebin
Reporter MezaEzis
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
152
Origin country :
LV LV
Vendor Threat Intelligence
Malware configuration found for:
RoboSki
Details
Link:
https://research.acce.ciphertechsolutions.com/results/2a994148-e1d2-4445-bd4d-f81b561add2a/
Malware family:
n/a
ID:
1
File name:
04eef5eb-89f4-435a-a1e2-6c9214879126.zip
Verdict:
No threats detected
Analysis date:
2026-02-09 22:58:05 UTC
Tags:
arch-email attachments attc-exe susp-attachments
Link:
https://app.any.run/tasks/bb7f2835-6960-4892-a63a-b6de77dc55f9

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Formbook
Create hunting rule
Link:
https://www.capesandbox.com/analysis/52910/
Verdict:
Malicious
Score:
92.5%
Link:
https://cyber-fortress.com/docs/result/index.php?id=698a873742fd65534cce1ea3
Tags:
virus msil
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
krypt packed
Link:
https://www.filescan.io/uploads/698b48b7552d46acbff202ef/reports/c2127811-6ddc-4c35-b3af-88b38c794128/overview
Verdict:
Malicious
Labled as:
Trojan.Generic
Link:
https://www.hybrid-analysis.com/sample/cb6107c4531b230c31244db28ca307058384a7ae968e0f0e41991f35a77b2e72
Verdict:
Malicious
File Type:
exe x32
First seen:
2026-02-09T18:20:00Z UTC
Last seen:
2026-02-11T10:01:00Z UTC
Hits:
~100
Detections:
Trojan.MSIL.Inject.sb Trojan.MSIL.Crypt.sb VHO:Trojan-PSW.Win32.Convagent.gen Trojan-Spy.Noon.HTTP.ServerRequest PDM:Trojan.Win32.Generic HEUR:Trojan-Spy.MSIL.Noon.gen Backdoor.Agent.HTTP.C&C Trojan-Spy.Win32.Noon.sb
Link:
https://opentip.kaspersky.com/cb6107c4531b230c31244db28ca307058384a7ae968e0f0e41991f35a77b2e72/results?tab=lookup
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/8d6419d1-1b2d-4afd-b3a6-38da6f6095e7
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/cb6107c4531b230c31244db28ca307058384a7ae968e0f0e41991f35a77b2e72
Verdict:
inconclusive
YARA:
10 match(es)
Tags:
.Net Executable Managed .NET PDB Path PE (Portable Executable) PE File Layout SOS: 0.43 Win 32 Exe x86
Link:
https://app.malva.re/file/4b839744f3da36cf3b8c629df940038e
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/cb6107c4531b230c31244db28ca307058384a7ae968e0f0e41991f35a77b2e72/
Verdict:
Malicious
Threat:
Family.FORMBOOK
Link:
https://tip.neiki.dev/file/cb6107c4531b230c31244db28ca307058384a7ae968e0f0e41991f35a77b2e72
Threat name:
ByteCode-MSIL.Trojan.Taskun
Create hunting rule
Status:
Malicious
First seen:
2026-02-10 00:59:46 UTC
File Type:
PE (.Net Exe)
Extracted files:
11
AV detection:
20 of 36 (55.56%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=znqqprctdmrqymjejwziziyhawbyjj5os2ha6dsbteptlj33fzza._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
error
Formbook
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook discovery rat spyware stealer trojan
Link:
https://tria.ge/reports/260210-se6s6aat2b/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
System Location Discovery: System Language Discovery
SmartAssembly .NET packer
Suspicious use of SetThreadContext
Formbook payload
Formbook
Formbook family
Unpacked files
SH256 hash:
cb6107c4531b230c31244db28ca307058384a7ae968e0f0e41991f35a77b2e72
MD5 hash:
4b839744f3da36cf3b8c629df940038e
SHA1 hash:
00a602284372a484294dd60c1f635f9f83cbb814
Link:
https://www.unpac.me/results/53d97715-64ba-4414-a69c-82f5ea259b58/
SH256 hash:
b31642c529fdf15f9c7d1d46eed96b37e21d26920a2d2fd55bba4f027d9cff05
MD5 hash:
005020cbc46620ca2f1b33cbee938f89
SHA1 hash:
0e2bc13d4175b307e1333f6a6cf83e3601d2f185
Detections:
SUSP_OBF_NET_ConfuserEx_Name_Pattern_Jan24
Create hunting rule
Link:
https://www.unpac.me/results/53d97715-64ba-4414-a69c-82f5ea259b58/
SH256 hash:
48fa91de316a3b8b9b173548ff297a529e8045cfba133655cb8d7bf2517df628
MD5 hash:
54f2d8dcde429e9fa2c0cef39b6bb0e7
SHA1 hash:
1b0181a02d9f36613fdd5170d1b84a5a8358b2af
Link:
https://www.unpac.me/results/53d97715-64ba-4414-a69c-82f5ea259b58/
SH256 hash:
189bd81378348e330b8cb575948a7ca78474ab650d0c6496ff7feb89d8295fed
MD5 hash:
9e8e85570cd899063fea6faa78770029
SHA1 hash:
4886f50a464519f942cc92f858918d7d72b0e96a
Link:
https://www.unpac.me/results/53d97715-64ba-4414-a69c-82f5ea259b58/
SH256 hash:
8ad10d970f716e438377f621ab312dce1479c809f8627e35369f4f303f8ce56f
MD5 hash:
5f335f182709012f9a54cf97be2c458b
SHA1 hash:
e3d41b5a86fbcf91b5825cfea7fb148daace0909
Detections:
win_formbook_g0
Create hunting rule
Link:
https://www.unpac.me/results/53d97715-64ba-4414-a69c-82f5ea259b58/
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/cb6107c4531b/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/cb6107c4531b230c31244db28ca307058384a7ae968e0f0e41991f35a77b2e72

YARA Signatures

MalwareBazaar uses YARA rules from several public and non-public repositories, such as YARAhub and Malpedia. Those are being matched against malware samples uploaded to MalwareBazaar as well as against any suspicious process dumps they may create. Please note that only results from TLP:CLEAR rules are being displayed.

Rule name:CP_Script_Inject_Detector
Create hunting rule
Author:DiegoAnalytics
Description:Detects attempts to inject code into another process across PE, ELF, Mach-O binaries
Rule name:DebuggerCheck__GlobalFlags
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerCheck__QueryInfo
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerHiding__Active
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerHiding__Thread
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DetectEncryptedVariants
Create hunting rule
Author:Zinyth
Description:Detects 'encrypted' in ASCII, Unicode, base64, or hex-encoded
Rule name:dgaagas
Create hunting rule
Author:Harshit
Description:Uses certutil.exe to download a file named test.txt
Rule name:Formbook
Create hunting rule
Author:kevoreilly
Description:Formbook Payload
Rule name:golang_bin_JCorn_CSC846
Create hunting rule
Author:Justin Cornwell
Description:CSC-846 Golang detection ruleset
Rule name:MD5_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for MD5 constants
Rule name:meth_stackstrings
Create hunting rule
Author:Willi Ballenthin
Rule name:NET
Create hunting rule
Author:malware-lu
Rule name:pe_imphash
Create hunting rule
Rule name:pe_no_import_table
Create hunting rule
Description:Detect pe file that no import table
Rule name:RIPEMD160_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for RIPEMD-160 constants
Rule name:SEH__vectored
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:SHA1_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for SHA1 constants
Rule name:shellcode
Create hunting rule
Author:nex
Description:Matched shellcode byte patterns
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
Rule name:TH_Win_ETW_Bypass_2025_CYFARE
Create hunting rule
Author:CYFARE
Description:Windows ETW Bypass Detection Rule - 2025
Reference:https://cyfare.net/

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Malspam

Formbook

Executable exe cb6107c4531b230c31244db28ca307058384a7ae968e0f0e41991f35a77b2e72

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/52910/

Comments